The short answer to this question is simply No. The website does not identify the winning squares for a contest. This is for a number of very valid reasons.
SBPS is about as flexible as we can possibly make it, to accommodate just about any crazy or rare rules your contest may or may not choose to use.
Because of this inherent flexibility, which lends itself to thousands of permutations of contest styles and intricacies, we really have no way of coding out a foolproof way for the site to understand exactly what everyone's contests are intending to do as far as "which square is the winner".
For example, some people use one grid for the entire game. All four quarters share the same grid. That's great. But some contests are structured with one grid for each quarter, which allows everyone a fresh set of numbers to root for every single quarter. Some contests, believe it or not, use strange things instead of the score - such as rushing yards vs passing yards.
The very last thing we want to do is take an educated guess as to how a particular contest is set up, post congratulatory messages or highlighted square colors, and find out that the squares we declared to be winners were actually... not. Then you have a bunch of players angry at the contest commissioner, who in turn gets angry at us, and all of this confusion carries with it the stench of fraud.
To avoid that - we simply choose not to identify winners, and instead built out a (somewhat) simple method for the commissioners to manually identify which squares won each prize, along with helpful notes to explain what prize was won and why.